import DictOptions from './dictOptions'
import DictData from './dictData'

export default function(dict, dictMeta) {
    const label = determineDictField(
        dict,
        dictMeta.labelField,
        ...DictOptions.DEFAULT_LABEL_FIELDS
    )
    const value = determineDictField(
        dict,
        dictMeta.valueField,
        ...DictOptions.DEFAULT_VALUE_FIELDS
    )
    return new DictData(dict[label], dict[value], dict)
}

/**
 * 确定字典字段
 * @param {DictData} dict
 * @param  {...String} fields
 */
function determineDictField(dict, ...fields) {
    return fields.find(f => Object.prototype.hasOwnProperty.call(dict, f))
}
